Hemstitch sewing-machine.



KOHLBRENNER. HEMSTITGH SEWING MACHINE.

APPLICATION I' IL ED OCT. 16, 1906.

W/T/VESSES:

THE uokms FETERspm, WASHINGTON. a. c.

IPATENTED JULY 2, 1907- o sun's- 113M 1.

z Q'INVE/VTOFI No. 858,724. PATENTED JULY 2, 1907.

G- KOHLBRENNBR.

HEMSTITGH SEWING MACHINE. 1rr1. 10u1on mnn 001215, 1906.

6 SHEETS-SHEET 3.

- wfi wi TORNEY.

7m; NORRIS PETERS co, WASHINGTON, u c,

No. 858,724. I PATENTED JULY 2, 1907.

G. KOHLBREIXNER; V HEMSTITGH SEWINGMACHINE.

APPLIOATION FILED 0012.15, 1906.

6 SHEETS-SHEET 4,

1; L27 I I,

W I J WITNESSES-x rs: "(Ri s PETERS co., WASHINGTON, D c.

No. 858,724. PATENTED JULY 2,1907.

e. KOHLBRBNNER. HEMSTITGH SEWING MACHINE.

APPLIQATION FILED 00T.16, 1906.

B SHEETS-SHEET 6.

.e. KOHLBRENNBR.

HEMSTITOH SEWING MACHINE. APPLIOATION FILED 001. 15, 1906.

PATENTBD JULY 2, 1907.

a snms snsm 6.

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W/T/ysss.- //v /v 0 r By ATTORNE rut NORRIS PETERS co iwnsmuaran, o. c.

UNITED STATES PATENT onnrcn.

GOTTFRIED KOHLBRENNER, OF ST. GALLEN, SWITZERLAND, ASSIGNOR, BY MESNE'ASSIGN- MENTS, TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

HEMSTITCH SEWING-MACHINE.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed October 15, 1906- Serial No. 339,001-

To all whom it may concern:

Be it known that I, Go'r'rrnrnn KoHLBREnNnR, a citizen of Germany, residing in St. Gallen, in the canton of St. Gallen, Switzerland, whose post-ofiice address is 7 Treuackerstrasse, St. Gallen, have invented certain new and useful Improvements in Hemstitch Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to an improvement in that class of embroidering machines in which the stitchforming and feeding mechanisms are rotatably mounted in the frame and are provided with means for imparting rotary movements thereto for changing the direction of feed and stitch formation, and more particularly to that variety of such machines in which the stitch-forming mechanism is adapted to produce what is known as the open-work or hemstitch seam.

The invention has for its primary object the control of the rotating means for the stitch-forming and feeding mechanisms in such manner thatits actuation is limited to a specific timing in reference to the stitchiorming and feeding operations, and especially to action only after a series or succession of stitches has been formed.

It has for its further object an improvement in the general construction and arrangement of parts whereby the operation of a hemstitch embroidering machine may be adapted for commercial operation.

Heretofore, attempts have been made to produce a crank embroidering machine fitted for hemstitching all of which were deficient to a greater or less degree in being directed to certain portions only of the machine without due allowance being made for other necessary operative parts, and the present improvement is designed to provide a machine of the class described which is operative in all essentials and adapted for actual commercial operation. 7

In its preferred form, the machine constructed according to the present invention comprises a frame composed of a bracket-arm with hollow upright and horizontal portions and a base or bed-plate, the head of the bracket-arm being provided with a rotatable cylinder carrying certain operative parts and the base or bed-plate being provided with a rotary carrierplate provided with certain other operative parts, such cylinder and carrier-plate being connected by a suitable gearing extended through the hollow bracketarm and base for turning the same in unison. One

member of the turning mechanism is provided with a detent-wheel having peripheral ratchet-teeth which are engaged by oppositely disposed spring-pressed detent-pawls normally in engagement therewith but adapted to be automatically thrown out of engagement by means of a reciprocating member actuated by a cam after each third stitch formation of a hemstitch figure or pattern.

The needle-bar, slidably mounted in the rotating cylinder, carries a pair of pivotally mounted needleclamps connected together for reciprocal oscillation, each being provided with a needle which cooperates with its respective oscillating shuttle disposed in a suitable race mounted upon the rotary carrier-plate,

means being applied to one of said needle-clamps for I oscillating the same to produce reciprocal vibrations of the needles, and a reciprocating piercer or. plunger is also carried by a bar slidably mounted in'said rotary cylinder for piercing the work intermediate the needles. A lower four-motion feeding mechanism is mounted upon the rotary carrier-plate and derives its movements from a cam-member mounted in the upright portion of the bracket-arm beneath and driven by the main-shaft. A rotary throat-plate is mounted upon the carrier-plate and receives the downward thrust of a pair of spring-actuating resser-feet mounted upon sliding rods carried by the rotatable cylinder and havving a connection with said cam-member whereby they are automatically lifted preparatory to each turning movement of the stitch-forming and feeding mechanisms, the rotary throat-plate being surrounded by a stationary work-plate upon which is normally pressed by means of a spring a clamping-foot mounted upon a rod journaled in a fixed portion of the head of the bracket-arm and adapted to be automatically lifted preparatory to each operative movement of the feeding mechanism. The upper and lower stitch-forming mechanisms are driven by connections directly with the main-shaft journaled in the bracket-arm, while the other operative work-engaging parts derive their automatic movements from the single cam-member at the junction of the vertical and horizontal tubular portions of the bracket-arm, from which the connections to the respective operative parts extend horizontally or vertically to the intermediate members of such connections.

The invention will be understood by reference to the accompanying drawings, in which- Figure 1 is a side elevation, partly in vertical section,

vation upon a larger scale, representing a portion of the bed-plate and the carrier-plate mounted therein with the parts which it carries. Fig. 4 is a plan of the carrier-plate and the parts mounted thereon. Fig. is a front end elevation of the head of the bracket-arm With the parts carried thereby, the rotary cylinder 21 being turned to expose the slot 21, lug 25 and groove embracing the latter, while the lower portion of the figure is shifted from left to right in relation to the upper portion through an angle of about 45 degrees to expose the work-engaging parts in flat rather than oblique view, which latter is the position which they would assume if represented consistently with the upper portion of the figure. Fig. 6 is a detail front elevational view of a portion of the head of the bracketarm to illustrate certain operative parts, and Fig. 7 is a transverse sectional view, similar to Fig. 2, but omitting parts therein represented, and showing the means for automatically turning the stitch-forming and feeding mechanisms for producing stitching in a set or predetermined pattern.

The main-shaft 1 is mounted in the upper portion of the bracket-arm 6 and carries at its forward end the take-up cam-cylinder having cam-groove 11 entered by the usual roller-stud 11 of the take-up anglelever 11. The outer end of the cam-cylinder 10 carries an eccentric boss 2 embraced by one end of a linkmember 2 having at its opposite end a socket 3 entered by a pin 5 carried by a slide-bar-t (Figs. 1, 5 and 6) having a forked-lug 4r embracing the necked offset portion of a perforated lug 7 at the upper end of the presserbar 7 which in turn embraces the needle-bar 17, the piercer-bar having at its lower end a transversely perforated lug 8 in which is secured the shank of the laterally recessed plunger or piercer 9 of usual or suitable form. The boss 2 carries an eccentric crank-pin 12 with anti-friction roller 13 entering a transverse groove or guide-Way in a block 15 carried by a slide M connected by means of a forked lug 16 extending intermediate a pair of fixed collars 17 upon the needle-bar 17 which latter is slidably mounted in the rotary cylinder 21.

The needle-bar carries at its lower end a block 18 having a pair of horizontally disposed pivotal screwstuds 18 upon which are mounted two needle-holders 19 and 20 adapted to oscillate thereon. Theneedle-holders are connected for reciprocal oscillation on their respective studs by means of lateral projections 19 and 20 thereon, respectively, the projection 19 being provided with a slot entered by a transverse pin upon the projection 20. Upon the cylindrical block or cylinder 21 is slidably fitted a ring 23 provided with an annular groove 22 and a screw-stud 24 entering a spiral groove 21 in the cylinder 21. The ring 23 is further provided in its inner periphery with a depending block 25 entering a comparatively broad clearance groove 21 in the cylinder 21. The block 25 is formed with a vertical aperture loosely embracing the upper end of a vibrating rod or lever 27 fixed in a lug 26 upon the needle-holder 20 and passingupwardly therefrom through the clearance groove 21 of the cylinder 21, as represented in Figs. 1 and 5.

The shifting of the ring 23 upon the cylinder 21 for oscillatingthe needle-holders 19 and 20 and consequently reciprocally vibrating the needles toward and from the piercer 9, is effected by means of a rocking yoke 29 having pivotal-pins 28 journaled in the bracket-arm head (3 and provided with diametrically opposite pins entering the groove of the ring 23. One of the pivotal pins 28 passes through the said wall of the head 6 and carries a substantially vertical arm 30 connected with the forward end of a link 32 whose opposite end is adjustably connected with the slotted upper portion of a vibrating lever 31 fulcrnmed at. 31 and carrying at its lower end a roller I19 entering a cam-groove of the cam-member 39 mounted upon a fixed stud 34 within the vertical portion of the bracket-arm and connected by means of intermeshing gears 33 and 35 with the main-shaft 1 to rotate at onethird the speed of the latter.

The single cam-member 39, which controls the operative movements of all the work-engaging membcrsof the machine excepting the stitch-forming mechanism, is provided in front of the gear 35 with cam-hubs 37 and 3S and annularly disposed cam-projections 4i and t2, and rearward of such geaewheel with cam-hub 3t; (Figs. 1 and 2).

The base or bed-plate 6 (see particularly Fig. 3) carries a stationary work-plate 131. formed with the. usual rectangular inspection apertures closed by slide-plates 131 having the usual thumb-nail notches 131, and with central opening entered by the rotary throat-plate 131. which is mounted upon suitable spaced lugs formed upon the rotary carrier-plate 53 having the axially disposed shaft 55. This vertically disposed shaft is formed with diametrically opposite longitudinal keyways 56 and 57 (Fig. 4) in which are fitted the sliding rods 58 and 59, respectively. The carrier-plate 53 is provided with a pair of spaced lugs 71 affording supporting bearings for a shaft having upwardly extending crank-arms 63 to which is pivotally attached by means of a pin 62 one end of the feedbar 52 carrying the feed-dog til. The feed-bar has at its end opposite the pivotal-pin ($2 a stud (i4 embraced by an upwardly extending bifurcated arm (i5 fixed upon a rock-shaft (37 mounted in lugs (St; depending from the carrier-plate 53 and provided with a forked lateral arm (58 embracing a stud-pin (59 upon the sliding rod 59. Upon the shaft 70, intermediate the arms 63 is adjustably secured a laterally extending feedbar lifting arm 76, and the outer end of said shaft is provided with a rigid arm 72 bifurcated at its outer end to embrace a lateral pin 73 of the sliding-rod 5S.

Fittedto the lower portion of the shaft 55 are two annularly grooved sliding rings 74 and 75 secured respectively to the rods 58 and 59. The ring 7-! has an annular groove 74 entered by dian'ietrically opposite blocks 4-9 secured to the extremities of the forked end of a rock-lever 49 pivoted intermediate its ends at 49 upon a bracket 87 depending from the bed-plate of the machine and pivotally connected at its opposite end with the lower extremity of a cam-rod 46 passing through a stationary guide-member 47 and carrying at its upper end a roller 15 maintained in continuous contact relation with the cam 38 by means of a spring 16 surrounding said rod intermediate a transverse thrustpin thereon and the bottom of the bracket-arm. The sliding ring 75 is similarly provided with an annular ltit) groove 75 entered by diametrically opposite blocks 48 pivotally secured to the extremities of the forked end of a rock-lever 48 pivotally mounted at 48 upon the bracket 87, with the opposite end pivotally connected with the lower extremity of a cam-rod 44 extending upwardly through the guide-member 47 and carrying a roller 43 pressed in normal contact relation with the cam 37 by means of a spring 44 surrounding said rod and interposed between a transverse thrust-pin thereon and the bottom of the bracket-arm.

As will be observed, the rocking of the levers 48 and 49 under the action of the cams 37 and 38 produces the vertical reciprocation of the slide-rods 58 and 59, which causes the successive lifting and longitudinal feeding movements of the feed-dog 61, which, with its carrying feedbar, operates through the rectangular opening 60 in the carrier-plate 53 journaled in the bedplate of the machine.

Slidably mounted upon the shaft 55 above the rings 74 and 75 is a third annularly grooved ring 77 which is provided with any suitable means for preventing its turning thereon, which ring is provided with a lateral pin 78 embraced by the lower end of a link 79 whose upper end similarly embraces a crank-pin 80 carried by the crank arm 80 of a rock-shaft 81 journaled in a depending lug 82 of the carrier-plate 53 and having its opposite end provided with a crank-arm 83 forked to embrace a roller 85 carried by the crank-arm 84 fixed upon one end of the shuttle-actuating rock-shaft 84" journaled in the lug 82 and carrying at its opposite end the shuttle-driver 86 entering the shuttle-race 87 depending from and secured to the carrier-plate 53. The vertical movement of the sliding ring 77 is produced by means of a rocklever 88 having one end forked to embrace said ring and provided with the diametrically opposite blocks 88 entering the annular groove 77 of said ring, said rock-lever being pivotally mounted intermediate it ends at 88 and pivotally connected at its opposite end with the lower end of an eccentric rod 89 whose upper end is provided with a strap 89 embracing an eccentric 89 upon the main-shaft. The rocking of the lever 88 by means of the actuating eccentric produces, through the connections before described, the oscillation of the shuttle driver 86 in amanner wellknown. W

Slidably mounted in the rotary cylinder 21 are the parallel presser-bars 120 to thelower ends of which are secured the presser-feet 119. The upper ends of these presser-bars are secured by means of screws 114 and intermediate washers to a thrust-ring 114 beneath the periphery of which-extend at opposite sides inturned lugs 115 of a rocking yoke 115 having pivotal pins 117 journaled in the head of the bracket-arm and provided on one side with a depending lug 118 disposed in the path of movement of the forward end of the reciprocating rod 50 extended rearwardly through the bracketarm and provided at its opposite end with a roller-stud 50 disposed in the annular path of movement of the cam-projection 42. To admit the lugs 115 beneath the thrust-ring 114, the upper end of the cylinder 21 is reduced to form a groove 116. The forward movement of the rod 50 under the action of the cam 42 causes the lifting of the thrust-ring 114 with the presser-bars 12 0,

the usual springs (omitted from the accompanying drawings as forming no part of the present improvement) being in practice employed to maintain the presser-feet 119 normally pressed upon the rotary throatplate 131. As indicated in Fig. 5, one of the pivotal pins 117 is provided upon its outer end with a crankarm 121 adapted for engagement with the-cam-shaped end of the usual lifting lever 122 for lifting the presserfeet 119 independently of the automatically acting lifting mechanism above described.

An annular clamping-foot 123, adapted to rest normally upon the stationary work-plate 131, is attached to the lower end of a presser-bar 124 slidably mounted in the head 6 of the bracket-arm and surrounded by the usual presser-spring 125 for maintaining the same in operative position upon the work. The presser-bar 124 is provided with a collar 126 having a lug 127 normally resting upon a nose 128 of the rock-shaft 129 journaled in the head of the bracket-arm. The rock-shaft 129 has a depending lug 130 lying in the path of move ment of the forward end of the reciprocating rod 51 extending longitudinally through the bracket-arm and represented in Fig. 1 as having a squared rearward end disposed within the annular path of movement of the cam-projection 41. As will be evident, the endwise movement of the rod 51 under the action of the cam41 causes the rocking of the shaft 129 and consequent automatic lifting of the clamping-foot 123, which is returned to initial operative position after each such actuation by means of the spring 125.

The lower end of the shaft 55 is journaled in a suitable bearing in the transverse member 54 of the base 6,

and carries a bevel-wheel 90 meshing with a similar wheel 93 of the shaft 92, which is mounted in bearings in the base members 54 and 91, and provided adjacent said member 91 with a bevel-wheel 101 meshing with a similar wheel 102 upon an upright shaft 103 having its opposite end journaled in a suitable bearing in the bracketarm and connected by means of bevel-wheels 104 with a horizontal shaft 105, also mounted in the bracket-arm, which is in turn connected at its forward end by means of bevel-wheels 106 with a sleeve mounted upon a fixed vertical bearing-stud 107 and provided with a gear-wheel 108 meshing with a gear-wheel 109 carried by the cylinder 21. As represented in Fig. 1, the vertical shaft 103 is provided in its lower portion with a bevel-wheel 110 meshing with a similar wheel 112 upon a transverse shaft 111 carrying at its outer end portion outside of the base 6 a hand wheel 113 by turning which the operator is enabled to rotate the cylinder 21 and carrier-plate 53 with the parts which they carry, the several sliding members journaled in the cylinder 21 being provided with suitable well-known means, such as spline-and-groove connections, by which they are rotated with the cylinder 21. p

The rearward end of the shaft 92 is provided with a detaining-wheel, represented in Fig. 2 as a ratchetwheel 94 having peripheral teeth normally engaged by the correspondingly shaped teeth of two oppositely disposed pawls 96 pivotally mounted upon the base 6 by means of stud-screws 96 and normally pressed in operative relation with said ratchet-wheel 94 by means of springs 95. The pawls 96 are formed with convergent adjacent edges which are engaged by a shiftingplate 98 formed with a socket 98 secured upon the lower end of a rod 97 having a forked upper end pivotally con- 7 nected with a rock-lever 99 mounted upon a fulcrumrial, and the presser-feet 119 and clamping-foot 123 are in normal lowered operative position in engagement with the work. During the second half of the first rotation of the main-shaft the needles and piercer rise and When out of the goods the needles are thrown inwardly into closed position against the piercer, In the first half of the second rotation of the main-shaft the needles and piercer descend for a second stitch in the puncture formed by the piercer and rise to initial elevated position in the second half of such rotation, during the latter part of which the clamping-foot 123 is raised, the feed-dog rises into contact with the work and is actuated to produce a feeding movement of the same, such oper ations of the clamping-foot and feed-dog occurring successively in the order named and while the needles are above the work intermediate their engagement of the same for the second and third stitch formations. In the first half of the third rotation of the main-shaft the needles and piercer descend closed and the clamping foot 123 returns to initial operative position in engagement with the work. During the second half of the third rotation of the main-shaft the needles and piercerrise and the presserfeet 119 are lifted, and when the needles and piercer become withdrawn from the work the detaining-wheel 94 is released by the locking pawls 96 and the cylinder 21 and carrier-plate 53 with their stitch-forming and other work-engaging members are permitted to turn for changing the dirction of feed and stitch formation, the needles being shifted, intermediate the third stitch-forming operation of the hemstitch pattern and the first of a succeeding series, into initial opened out or extended position preparatory to repetition of the cycle of operation just described.

While in many cases the machine is preferably controlled in its direction of operation by the operator, in Fig. 7 is represented a device for automatically controlling the rotating mechanism for the stitch-forming and feeding mechanisms.

Upon a fixed stud 135 secured in the machine base 6 is removably mounted a cam-cylinder 132 formed with a cam-groove 133 entered by a roller-stud 136 carried by onearm of a rock-lever 134 mounted upon a screw-stud 134 and having at the extremity of its other arm a toothed sector meshing with a pinion 137 fixed upon the shaft 103. Loosely journaled upon the fixed end of the stud 135 is a lever 138 carrying a pawl 139 in operative engagement with the peripheral teeth of a ratchetwheel 140 rigidly connected with the cam-cylinder 132, said lever 138 having a slotted outer end in which is adjustably secured the lower end of a link 141 having its upper end also adjustably secured in the slotted end of the vibrating lever 99. As the (351111.36 which aetnates the rock-lever 99 has only a single operative point in its circumference, and is driven by the interincshing gears 33 and 35 at one-third the speed of rotation of the mainshaft 1, it is evident that the pattern-cam 132, 133, derives an operative movement simultaneously with the unlocking movement imparted by the lever 99 to the lockingpawls 96. Inasmuch as the pattern-cam is retained upon its supporting stud 135 only by means of the nut 135 upon the reduced and threaded end of the stud 135, it is evident that by removal of the latter the cam may be readily withdrawn and replaced by another with different form of cam-groove for producing a d i tierent pattern of hemstitch seam.

The various details of the stitch-forming mechanism for handling the threads in the stitch-forming operations are not specifically shown and described herein, as they may be of any suitable or well-known description and in themselves form no part of the present improvement.

While I have shown and described herein an automatically controlled device for temporarily resisting the turning of the stitch-forming and feeding mechanisms in crank hemstitch embroidcring ma chines, it is to be understood that this feature is adapted. for embodiment in other universal iced sewing machines and i not limited to the particular form of locking device represented herein, and I believe myself. to be the tirst to employsuch a device in sewing machines of the class described. I further believe myself to be the first toha've produced a commercially operative crank hemstitch embroidering machine provided with automatic-ally controlled means for turning the stitch-forming and feeding mechanisms, the and or piercer and presserfoot, as Well as certain other minor constructive features recited in the app ended claims.

Having thus set forth the nature of the invention, what I claim is:

1. In a sewing machine, in combination, stitelrforming mechanism, universal feeding mechanism for determining the direction of advance of the fabric and of stitch turnintion, and means for alternately applying and removing resistance to the rotation of said universal feeding mechanism during a cycle of operation of the machine for eontrolling the timing of changes in the direction of feed and stitch formation.

2. In a sewing machine, in combination, stitclrforming mechanism, universal feeding mechanism for determining the direction of advance of the fabric and of stitch forination, and cam-controlled means for maintaining a resistance to the rotation of said universal feeding mechanism during the production of a succession of stitches and removing said resistance preparatory to the production of. a new succession of stitches.

In a sewing machine, in combination, stitch-formiim and feeding mechanisms mounted to rotate in unison and in fixed axial relation, means for rotating said mechanisms for varying the direction of feed and stitch formation, and means for alternately applying and removing a resistance to the rotation of said mechanism during' a cycle of operation of the machine.

4. In a sewing, machine, in combination, stitclrforming and feeding mechanisms mounted to rotate. in unison and in Iixed axial relation, means for rotating said mechanisms for varying the direction of feed and stitch formation, and automatically acting means for alternately applying and removing a resistance to the rotation of said mechanisms during a cycle of the machine.

' 5. In a sewing machine, in combination, stitch-forming and feeding mechanisms mounted to rotate in unison and in fixed axial relation, means for rotating said mechanlltl l l l isms for varying the direction of feed and stitch formation, and means independent of the rotating means for alternately applying and removing a resistance to the rotation of said mechanisms during a cycle of operation of the machine.

6. In a sewing machine, in combination, upper and lower stitch-forming mechanisms and feeding mechanism all mounted to rotate in unison and in fixed axial relation, a rotary main-shaft with which said stitch-forming mechanisms are connected to codperate in a stitch-forming operation for each rotation of said main-shaft, means for rotating said stitch-forming and feeding mechanisms for varying the direction of feed and stitch formation, and means for maintaining a resistance to said rotating means during a plurality of rotations of said main-shaft and for removing said resistance during a succeeding rotation of said main-shaft.

7. In a sewing machine, in combination, upper and lower stitch-forming mechanisms and feeding mechanism all mounted to rotate in unison and in fixed axial relation, a rotary main-shaft with which said stitch-forming mechanisms are connected to cooperate in a stitch-forming operation for each rotation of said main-shaft, means including a rotary shaft for rotating said stitch-forming and feeding mechanisms for varying the direction of feed and stitch formation, a detaining wheel on said shaft, a detent normally in engagement with said detaining wheel, and means for disengaging said detent from the detaining wheel.

S. In a sewing machine, in combination, upper and lower stitch-forming mechanisms and feeding mechanism all mounted to rotate in unison and in fixed axial relation, a rotary main-shaft with which said stitch-forming mechanisms are connected to cooperate in a stitch-forming operation for each rotation of said main-shaft, means including a rotary shaft for rotating said stitch-forming and feeding mechanisms for varying the direction of feed and stitch formation, a detaining wheel on said shaft, a de tent normally in engagement with said detaining wheel, and means inactive during a plurality of stitch formations for disengaging said detent from the detaining wheel.

9. In a sewing machine, in combination, stitch forming mechanism comprising a plurality of laterally moving reciprocating needles and adapted to rotate upon a fixed axis, feeding mechanism adapted to rotate with said stitch-forming mechanism, means for rotating'said stitchforming and feeding mechanisms for varying the direction of feed and stitch formation, actuating means for imparting to the feeding mechanism a feeding action for one only of a plurality of stitch formations, and a clamping foot operative continuously upon the work during a plurality of stitch formations while the feeding mechanism is inactive.

10. In a sewing machine, in combination,stitch-forming mechanism comprising a plurality of laterally moving re ciprocating needles and adapted to rotate upon a fixed axis, a throat-plate, feeding mechanism disposed beneath said throat-plate and adapted to rotate With said stitchforming mechanism, means for rotating said stitch-forming and feeding mechanisms for varying the direction of feed and stitch formation, actuating means for imparting to the feeding mechanism a feeding action for one only of a plurality of stitch formations, and a clamping foot operative upon the work during a plurality of stitch formations while the feeding mechanism is inactive.

11. In a sewing machine, in combination, stitch-forming mechanism comprising a plurality of laterally movin'g reciprocating needles and adapted to rotate upon a fixed axis, a rotary throat-plate, feeding mechanism disposed beneath said throat-plate and adapted to rotate with said stitch-forming mechanism, means for rotating said stitchforming and feeding mechanisms and throat-plate whereby the direction of feed and stitch formation may be varied, and actuating means for imparting to the feeding mechanism a feeding action for one only of a plurality of stitch formations.

12. In a hemstitch embroidering machine, in combination, stitch-forming mechanism comprising a plurality of laterally moving reciprocating needles and adapted to r0- tate upon a fixed axis, a reciprocating piercer intermediate said needles, and feeding mechanism adapted to rotate in unison with said stitch-forming mechanism, and auto- -matically controlled means whereby said stitch-forming and feeding mechanisms and said piercer may receive rotating movements only after a plurality of stitches has been formed.

13. In a hemstitch embroidering machine, in combination, stitch-forming mechanism comprising a plurality-of laterally moving reciprocating needles and adapted to rotate upon a fixed axis, a reciprocating piercer intermediate said needles, a throat plate and feeding mechanism, all adapted to rotate in unison with said stitch-forming mechanism, means for rotating said stitch-forming and feeding mechanisms, piercer and throat-plate, a clamping foot, a stationary work-plate cooperating therewith in holding the work, means for maintaining said' clamping foot normally in yielding operative relation with said stationary workplate, and automatically acting means for lifting said clamping foot intermediate successive series of stitch formations.

14. In a universal stitching and feeding sewing machine, in combination, stitchforming mechanism adapted for rotation, a work-engaging presser adapted to rotate therewith, a nona-otatable clamping foot, a throat-plate beneath said Work-engaging presser and adapted to rotate therewith, a stationary workplate beneath said clamping foot, means for rotating said stitch-forming mechanism, worlcengaging foot and throatplate, actuating means for said clamping foot whereby the same is maintained in operative relation with the Work for a plurality of consecutive stitch-formations and is withdrawn from the work for a succeeding stitch-formation, and actuating means whereby the work-engaging presser is actuated once only for a corresponding plurality of consecutive stitchformations.

15. In a sewing machine, in combination, a frame comprising a bracket-arm and a bed-plate, a main or driving shaft mounted in said bracket-arm, a rotatable cylinder mounted in the head of the bracket-arm and a rotatable carrier-plate mounted in the bed-plate with axes of rotation in vertical alinement, stitch-forming mechanism comprising a needle-bar carrying a plurality of needles and slidably mounted in said cylinder and cooperative looptaker mechanism mounted upon said carrier-plate, a feedbar mounted upon said carrier-plate and carrying a feeddog, means for imparting operative movements to said feed-bar including cams operatively connected with the main or driving shaft and differentially driven relative to said shaft, and means for rotating said cylinder and carrier-plate.

16. In a sewing machine, in combination, a frame comprising a bracket-arm and a bedplate, a main or driving shaft mounted'in said bracket-arm, a rotatable cylinder mounted in the head of the bracket-arm and a rotatable carrier-plate mounted in the bed-plate with axes of rotation in vertical alinement, stitch-forming mechanism comprising a reciprocating needle-bar slidably mounted in said cylinder and carrying pivotally mounted needle-holders connected together for reciprocal oscillation and each provided with a needle, a sliding rod also mounted in said cylinder and carrying a piercer intermediate said needles, a vibrating lever rigidly connected with one of said needle-holders, means carried by said cylinder for vibrating said actuating lever, a rotatable carrierplate journaled in the bed-plate and carrying a throat-plate and coiiperating loop-taker mechanism, feeding mechanism carried by one of said rotatable members, and means for r0- tating said cylinder and carrier-plate to vary the direction of feed and stitch formation.

17. In a sewing machine, a frame comprising a bracketarm and a bed-plate, a rotatable cylinder mounted in the head of the bracket-arm, a rotatable carrier-plate mounted in the bed-plate, stitch-forming and feeding mechanisms carried by said cylinder and carrieuplate, means for rotating said cylinder and carrier-plate, and means including a ratchet-and-pawl device for normally resisting the rota tion of said cylinder and carrier-plate and for automatically releasing the same after a. stitch production.

, u 18. In an embroidering sewing machine, in combination, a frame comprising a bracket-arm composed of an upright hollow post and a tubular lateral portion and a bedplate, a main-shaft jonrnaled in the lateral portion of the 5 bracketerm, stitch-forniing and feeding; mechanisms and a v cloth resser rotatably mounted in said frame, connections between the main-shaft and the stitch-forming mechanism for actuating the latter, a cam-member disposed within said bracket-arm and at the junction of the upright and 10 lateral portions thereof, actuating connections between said cam-member and the feeding mechanism and cloth resser, and means for rotating said .stiiclrforining and feeding mechanisms and cloth prcsser.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses. 15

GOTTFRIEI) KOHLBR lrlNNlflli.

Witnesses JOHN LEEMAXY, MARY FALCONER. 

